Same way the 2000-up Monte Carlo/Impalas, and I am assuming the Grand Prixs as well. I want to say the high-end GMs used the pressure sensor, but I am not certain if they even still use that setup. It makes upgrading rims pretty difficult unless you want to get rid of that function altogether.

Which brings us to this question: Has anyone noticed a change in the way the WSS system operates when rims are upgraded? If there were to be any sort of effect, it would have to happen when the rolling diameter of the rim/tire combo changes (i.e. gets larger, since nobody downgrades sizes). If not, then it means that the ECM could care less what the size of the rims are, so long as ALL rim/tire combos are the same on all corners and 2)they all have the same pressure.

it simply measures a difference in one wheel vs teh other three, so if all 4 tires /wheel were changed, then no, the inflation monitor would not be affected

For all concerned:

I found these links to help answer a few questions and whatnot.

http://www.gmgoodwrench.com/_res/pdf...Monitoring.pdf
Page 2 of 4 tells the theory of operation on this system, the rest I think is just fluff.

http://www.cadillacfaq.com/faq/answe...operation.html
A bit more in-depth than above article.

http://etools.org/files/public/Tire_...te_from_GM.pdf
Shows what the sensors inside the rim look like.


I could not find any good articles on WSS based systems, but I am sure they are out there in cyberspace somewhere.

EDIt: Post 666.....that ain't too good.